Silicone Cold Shrink Tubing Wrap Grip Protective Sleeve
- Power Frequency Withstand Voltage:
- 54 kV, 5 min, No Breakdown
- Partial Discharge Test:
- Partial Discharge Magnitude≤ 10 pC at 20 kV
- Impulse Voltage Test:
- 125 kV, 10 positive and 10 negative impulses, no breakdown
- Constant Voltage Load Cycling Test (in Air):
- 35 kV, conductor temperature 95–100 ℃, total 60 cycles, no breakdown, no flashover
- Thermal Stability Test (185 mm² Conductor):
- 23.4 kA, 2 s, twice, no visible damage
- Dynamic Stability Test:
- 82.6 kA, ≥ 10 ms, no visible damage
- Moisture Test (Indoor):
- 15 kV, 300 h, no breakdown, no flashover
- Salt Spray Test (Outdoor):
- 15 kV, 1000 h, no breakdown, no flashover
Medium-voltage electrical infrastructure demands dependable moisture protection and continuous insulation resistance. Hangda manufactures high-grade Cold Shrink Cable Accessories designed for 12/20kV and 18/20kV power distribution networks. Utilizing factory-expanded elastomeric compounds, each silicone cold shrink tube delivers constant radial tension directly over cable joints and terminations without open flames or heat torches.
Moisture Ingress Protection and Mechanical Durability
Outdoor cable joints face ultraviolet radiation, chemical runoff, and severe thermal cycling. Applying a cold shrink wrap creates a resilient active seal that moves with thermal expansion.
-
Resists tracking and erosion under severe environmental weathering.
-
Maintains high dielectric strength exceeding 20 kV/mm under continuous operational loads.
-
Provides hydrophobic surface properties that prevent surface moisture film formation.
Technical Specifications
| Parameter | Tested Value | Standard |
|---|---|---|
| Operating Voltage | 12/20 kV, 18/20 kV | IEC 60502-4 |
| Tensile Strength | ≥ 10.5 MPa | ASTM D412 |
| Elongation at Break | ≥ 750% | ASTM D412 |
| Volume Resistivity | ≥ 1.0 × 10¹⁴ Ω·cm | ASTM D257 |
Application Procedure and Structural Security
Safe Installation Sequence
Field assembly requires zero specialized tooling, eliminating flame permits inside enclosed vaults.
-
Position the silicone shrink tubing over the prepared cable core.
-
Extract the inner supporting spiral core counterclockwise.
-
Inspect the uniform collar contraction across the entire splice interface.
The elastic cold shrink grip secures cable jackets against mechanical vibration and harsh contaminants.
12/20, 18/20 kV Fully Cold Shrink Three-Core Terminal – Installation Outline Drawing
Electrical Performance Tests
| No. | Test Item | Standard Requirements |
| 1 | Power Frequency Withstand Voltage | 54 kV, 5 min, No Breakdown |
| 2 | Partial Discharge Test | Partial Discharge Magnitude≤ 10 pC at 20 kV |
| 3 | Impulse Voltage Test | 125 kV, 10 positive and 10 negative impulses, no breakdown |
| 4 | Constant Voltage Load Cycling Test (in Air) | 35 kV, conductor temperature 95–100 ℃, total 60 cycles, no breakdown, no flashover |
| 5 | Thermal Stability Test (185 mm² Conductor) | 23.4 kA, 2 s, twice, no visible damage |
| 6 | Dynamic Stability Test | 82.6 kA, ≥ 10 ms, no visible damage |
| 7 | Moisture Test (Indoor) | 15 kV, 300 h, no breakdown, no flashover |
| 8 | Salt Spray Test (Outdoor) | 15 kV, 1000 h, no breakdown, no flashover |
Product overview
◆The product is available in single-core, two-core, three-core, four-core, and five-core versions, and has been widely used for low-voltage cable terminations and intermediate connections.
◆Excellent surface hydrophobicity, ensuring the product maintains strong resistance to contamination.
◆Compact size, lightweight, and reliable performance.
◆Application Scope: The product demonstrates excellent cold and heat resistance, making it particularly suitable for high-altitude, cold, humid, salt-spray, and heavily polluted environments.
Installation requires no open flame, making it ideal for flammable and explosive areas such as petroleum, chemical, mining, and tunneling sites.
 |
 |
 |
 |
| 12/20 kV Single-Core Cold Shrink Indoor Termination – Installation Drawing | 12/20 kV Three-Core Cold Shrink Outdoor Termination – Installation Drawing | 12/20 kV Three-Core Cold Shrink Outdoor Termination – Supporting Drawing | 12/20 kV Three-Core Cold Shrink Intermediate Connection – Supporting Drawing |
Technical Data - Model Selection
| Product Type | Model | Conductor Cross-section(mm²) |
| 12/20 kV Cold Shrink Indoor Termination | GHD-20HNLS-3(1)*35-500 | 35-500 |
| 12/20 kV Cold Shrink Outdoor Termination | GHD-20HWLS-3(1)*35-500 | 35-500 |
| 12/20 kV Cold Shrink Joint | GHD-20JTLS-3(1)*35-500 | 35-500 |
| 18/20 kV Cold Shrink Indoor Terminationl | GHD-24HNLS-3(1)*35-630 | 35-630 |
| 18/20 kV Cold Shrink Outdoor Termination | GHD-24HWLS-3(1)*35-630 | 35-630 |
| 18/20 kV Cold Shrink Joint | GHD-24JTLS-3(1)*35-630 | 35-630 |
